package juc;

import java.util.concurrent.CountDownLatch;

public class CountDownLatchDemo {
    public static void main(String args[]) throws InterruptedException {
        CountDownLatch countDownLatch = new CountDownLatch(6);
        for (int i = 0; i < 6; i++) {
            new Thread(() -> {
                System.out.println(Thread.currentThread().getName() + "\t离开教室");
                countDownLatch.countDown();
            },String.valueOf(i)).start();
        }

        countDownLatch.await();
        System.out.println(Thread.currentThread().getName() + "\t班长锁门");
    }

    private static void clooseDoor() {
        for (int i = 0; i < 6; i++) {
            new Thread(() -> {
                System.out.println(Thread.currentThread().getName() + "\t离开教室");
            },String.valueOf(i)).start();
        }

        System.out.println(Thread.currentThread().getName() + "\t班长锁门");
    }
}
